'External panelize' results cleared when opening another result

[dnied]

The panel containing 'external panelize' results is cleared when opening a result, then opening another.

How to reproduce:

1. C-x!

2. launch an 'external panelize' command, either by recalling a previously stored command or typing a new one, like 'find . -type f'

3. when the results come up, open one by hitting the RETURN key

4. if a program is launched for that file, quit it

5. open another result by hitting the RETURN key

Unexpected result: the panel is cleared, showing just the '../' entry.

mc --version
GNU Midnight Commander 4.8.8
Built with GLib 2.32.4
Using the ncurses library
With subshell support as default
With support for background operations
With mouse support on xterm
With support for X11 events
With multiple codepages support
Virtual File Systems: cpiofs, tarfs, sfs, extfs, ftpfs, fish
Data types: char: 8; int: 32; long: 32; void *: 32; size_t: 32; off_t: 64;

Also verified in mc 4.8.4

[andrew_b]

Branch: 3032_panelize_reload_fix.
changeset:85da04af0235ecf6ec99ce61e76b49d69ee2e1e2

[andrew_b]

Fixed as #3489.